Gas-generator for furnaces



(No Model.) 48hets-Sheet 1.

J. E. BOTT. GAS GENERATOR FOR FURNACES.

Patented Sept. 25, 1883.

W1 TNESSES:

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J. E. BOTT.

GAS GENERATOR FOR FURNACES. No. 285,561. Patented Sept. 25, 1883.

WITNESSES: 1N VEN T O;

3 t e e h s w e e h S 4- TUE G a d 0 M 0 w No. 285,561. Patented Sept.25, 1883.

WITNESSES:

N. PEYEIS. Hutu-Litho rapher. Wzshinghxr. 0. c.

(No Model.) Q 4 Sheets-Sheet 4;

A J. E. BOTT.

K GAS GENERATOR FOR FURNACES. No. 285,561. Patented Sept. 25, 1883.

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WITNESSES: u g/flq A INVENTOR v & AM

UNITED 'STATEsj PATENT ()FFICE.

JOSEPH E. .BOTT, or MAncUs noon, ASSIGNOR, BY manor AND MESNE AS-SIGNMENTS, TOJOHN M. BROOMALL, J R., OF MEDIA. AND EDDY L. CLARK ANDEDXVARD H. BURR, OF PHILADELPHIA, PENNSYLVANIA.

GAS-GENERATOR FOR FURNACES.-

SPECIFICATION forming part 015 Letters Patent'No: 285,561, datedSeptember 25, 1883.

' llpplicaiion filed March 1!), 1883. (No model.)

1'0 all whom it may concern:

Be it known that I, J OSEPH ELTON Born a subject of the Queen of Great'Britain and Ireland, and a resident of Marcus Hook, Delaware county,Pennsylvania, United States of America, have invented certainImprovements in Gas Generators for Furnaces, of which the following is aspecification.

My invention relates to certain improve ments in apparatus forgenerating gases for use in heating, puddling, smelting, and otherfurnaces, my improvements being mainly in connection with the tuyeresand the fuel-supplying devices, all as hereinafter fully set forth. I

In the accompanying drawings, Figure 1, Sheet 1, is a side view of myimproved gasgenerator; Fig. 2, a plan view of the same; Fig. 3, Sheet 2,a longitudinal section on the line A B; Fig. 4:, a sectional plan 011the line G H; Fig. 5, Sheet 3, an end view of the generator; Fig. 6, atransverse section on the line C D Fig. 7, a sectional plan on the lineI J Fig. 8, Sheet 4, a transverse section on the line E F; and Fig. 9,an enlarged view of part of Fig. 8.

The casing K of the generator is preferably composed of east or wroughtiron plates suitably fastened together, and having a lining, L, offire-brick or other refractory material. The casing incloses thegas-generating chamberQ,

' at the bottom of which is a water-tube grate,

M, 011 which the coal or other fuel is deposited, access to the lowerportion of the mass of fuel being had through doors Z in the sides ofthe casing, and openings Z being formed in the sides and ends of saidcasing for the insertion of: implements wherewith the fuel 011 the gratemay be stirred or agitated. (See Figs. 1, 3, 6, and 8.)

In each side wall of the generator is formed a continuous corrugatedtuyere, O, which extends from end to end of the generator, as shown inFigs. 3 and 7 5 or, if the latter is made of circular instead ofquadrangular form, the tuyere would by preference extend completelyaround it.

Extending along each side of the casing, and communicating with thechamber Q through the tuyere, is a tuyere-box, N,whieh receives a supplyof heated air through a pipe or duct,

Y, from an air-heating box, X, in the top of the chamber Q, this boxreceiving its supply of air through a pipe, Y, at one end. (See Figs. 1,4, 6, 7, and 8.) Branch pipes P afford communications between the boxesN and the ash-pit, so as to provide a supply of heated air beneath thegrate, Figs. 1, 3, 5, and 6. The flow of air through the tuyeres 0 intothe niass of fuel in the chamber Q may be as gentleor as forcible asdesired, this being governed by regulating the pressure of the blast ofair entering the box X through the pipe Y. Whatever may be the force ofthe blast, however, it is uniform from end to end of the generator,owing to the continuous tuyere; and I am thus enabled to produce largevol umes of gas, even when inferior fuel is employed, for the heated airis diffused in a thin stratumthroughoutalargemassofincandescent fuel,thorough distribution of the air being illsured and uniform combustiontaking place,

so that the distillation of the fuel proceeds regularly, and the ash orresidue is left in a more friable form than when the blast is admittedin foreibl e and concentrated j ets through isolated tuyeres, for in thelatter case conr bustion throughout the mass is more or less irregular,and there is a tendency to fuse the ash and form cllnkers in thevicinity of the tuyeres. Moreover, in my improved genera tor thediffused blast through the continuous tuyere can be safely reduced, whenit is de sired to curtail the production of gas,without causing the zoneof active combustion to become uneven, as is the case when the blast isadmitted through isolated tuyeres.

It will be observed that the corrugated. tuyere diminishes in area atand near the top, this being the preferable form of the tuyere, as thefuel at the top of the tuyereis not in such an active state ofcombustion as that at the base of the 'tuyere. The gases evolved from.the fuel are mixed in the upper portion of the chamber Q and pass offthrough the pipes It to the regenerator or other point at which they areto be used.

Above the casing of the generator, and at each side of the same, are thefuel-hoppers S, which are narrow quadrangular boxes, the continuity ofwhich is interrupted at the air-duct Y, Figs. 2 and 4. Each of thesehoppers is closed by a valve, T, the thickened butt-end of which restsupon a rib, V, on the inside of the easing L, the thin front edge of thevalve closing against a ribJV in the hopper, so as to form a gas-tightjoint. Each valve is connected by a rod, U, to a weighted lever, V, hungto a bracket, V, on the hopper, and tending to keep the valve closed.(See Fig. 9.) Fuel is deposited in the hoppers, and when it becomesnecessary to replenish the chamber Q the valves are depressed, so as topermit the descent of the fuel into said chamber. The supplies of fuelare deposited at and near the sides of the chamber,where the action ofthe air-blast is most effective; hence I consider this method of feedingmore advantageous than a central feed, such as is usually employed. Thevalves T simply rest on the ribs XV, no hinges or pivots being used inconnec tion with said valves, so that when. a valvebecomes burned out orotherwise injured it can be readily removed and a new one inserted.

To prevent the access of fuel to the space behind the valve, or betweenthe valve and the ribW, I use a flexible strip, W, preferably of thinsheet metal, the upper end of which is secured to the inside of thehopper-casing, 5

the lower free end bearing on the valve at and near the butt of thesame. (See Fig. 9.)

I claim as my invention 1. The combination of the fuel-chamber of agas-generating furnace'with atuyere having 40 a waved orcorrugatedoutline, as set forth.

2. The combination of the fuel chamber with a waved or corrugated tuyerecontracted in area at and near the top, as set forth.

3. The combination of the'fuel-hoppers, the

ribs W, andseats W with the valves T, resting on the ribs WV and closingagainst theseats W as set forth.

4:. The combination of the fuel-hopper, rib

NV, and valve T with the projecting strip WV,

JOSEPH ELTON Bor-r.

XVitnesses:

HARRY L. ASHENFELTER, HARRY SMITH.

